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Unformatted text preview: Fall 2009 These questions ONLY from text readings Exam also will cover lectures & outside readings Chapter 6, pp. 159-164 1. What is a predator? • An animal that preys on other animals 2. What are the differences among crypsis, homotypism and aposmatism? • Crypsis- camouflage • Homotypism- resembling something inedible • Aposmatism- warning coloration 3. How do lacewing predators keep from being detected by ants that are there to protect the lacewing food, aphids? • Larval lacewings pluck waxy cotton fluff from the backs of woolly alder aphids and affix it to specialized grappling hooks on their own backs, disguising themselves among the ants 4. Define Batesian mimicry. • Situation in which a palatable mimic resembles a toxic model 5. What is thanatosis? Name a bug that practices this. • Playing dead; leaf beetles (Chrysomelidae) 6. What are reactor glands and how are they used? • Where two or more relatively inactive compounds are combined to create a chemical reaction in use for offence 7. What is reflex bleeding and what role can it play in bug defense? • When a weakened area of cuticle where an insect can force its blood, often with great force, causing spraying Chapter 4 1. What are the 3 basic criteria met by all social bugs? • Members collectively care for offspring(cooperative care of offspring) • Individuals in society mate and lay eggs and others may protect the colony, and others care for the young (reproductive division of labor) • Generations overlap so offspring can grow up to assist their parents ain care of the young 2. What is a eusocial bug? What are the advantages of this lifestyle? • Truly social bug; they are the only ones that exhibit altruistic behavior; enhanced defense against enemies, reduces probability that any individual can get singled out and eaten, improve successes at raising young, improves likelihood that an individual will find and secure food, allows individuals to exploit a short-lived food source more efficiently, and by being in a group, individuals are not so much at the...
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